在深入分析传真译码原理的基础上,提出一种新的构造一维改进的Huffman码码表的方法,并根据FPGA的特点,构造出了黑白译码表。同时,基于ALTERA公司的Cyclone系列器件EP1C20F400C7开发板,实现了该传真译码电路。文中的译码电路构造新颖,结构简单。实际测试表明,该电路稳定性、译码速度、集成度都有显著提高。 Based on the deep analysis of the principle of fax decoding, a new method of constructing one-dimensional improved Huffman code table is proposed. According to the characteristics of FPGA, a black-and-white decoding table is constructed. At the same time, based on ALTERA Cyclone series devices EP1C20F400C7 development board, to achieve the fax decoding circuit. The decoding circuit in the text is novel in construction and simple in structure. The actual test shows that the circuit stability, decoding speed, integration have significantly improved.